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    <script>
      //3. 改变 promise 状态和指定回调函数谁先谁后?  都有可能
      // resolve/reject/throw    then/catch
      let p = new Promise((resolve, reject) => {
        //改为成功
        setTimeout(() => {
          resolve("OK");
        }, 1000);
      });

      p.then((v) => {
        console.log(v);
      });
    </script>
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